I'm guessing you hate Avenged Sevenfold as much as RedOctane did when they recorded their "cover" of it.
Sweet Child O' Mine, Carry On Wayward Son, Hangar 18, Them Bones.
I'd pick songs from GH1 but the hammer-ons and pull-offs work so badly in that game that I don't find many of the songs fun, just frustrating.
Beast and the Harlot made me cry. It sounds so awful.